CV221-2A_07

CV221-2A Product Features • High dynamic range downconverter with integrated LO and IF amplifiers 1.9 – 2.7 GHz Dual-Branch Downconverter Product Description The CV221-2A is a dual-channel high-linearity downconverter designed to meet the demanding performance, functionality, and cost goals of current and next generation mobile infrastructure basestations and repeaters. It provides high dynamic range performance in a low profile RoHS-compliant/lead-free surface-mount leadless package that measures 6 x 6 mm square. It is ideally suited for high dynamic range receiver front ends using diversity receive channels. Functionality includes frequency conversion and IF amplification, while an integrated LO driver amplifier powers the passive mixer. The MCM is implemented with reliable and mature GaAs MESFET and InGaP HBT technology. Typical applications include frequency downconversion used in 3G W-CDMA and WiMax basestation transceiver or repeater applications. Functional Diagram AMP1 INPUT IF1 OUTPUT 23 GND MIXER IF1 GND 28 RF 1 1 INPUT GND 2 BIAS 3 GND 4 GND 5 GND 6 RF 2 7 INPUT 27 GND 26 25 24 • • • • • • • Dual channels for diversity +28 dBm Input IP3 +11.5 dBm Input P1dB RF: 1900 – 2700 MHz IF: 65 – 300 MHz +5V Single supply operation RoHS-compliant / Pb-free 6x6mm 28-pin QFN package • Low-side LO configuration RF IF IF Amp 1 GND 22 21 BIAS 20 GND 19 GND 18 GND 17 LO 16 GND 15 GND 14 GND LO Driver Amp IF Amp 2 RF 8 GND 9 MIXER IF2 IF 10 GND 11 AMP2 INPUT 12 GND 13 IF2 OUTPUT Specifications (1) Parameters RF Frequency Range LO Frequency Range IF Frequency Range % Bandwidth around IF center frequency IF Test Frequency SSB Conversion Gain Gain Drift over Temp (-40 to 85 °C) Input IP3 Input 1 dB Compression Point Noise Figure LO Input Drive Level LO-RF Isolation LO-IF Isolation RF-IF Isolation Branch-Branch Isolation Return Loss: RF Port Return Loss: LO Port Return Loss: IF Port Operating Supply Voltage Supply Current Thermal Resistance Junction Temperature Units MHz MHz MHz % MHz dB dB dBm dBm dB dBm dB dB dB dB dB dB dB V mA °C / W °C Min Typ 1900 – 2400 1600 – 2335 65 – 300 ±7.5 240 9.2 ±0.6 +28 +11.5 11 0 12 26 25 45 14 14 13 +5 315 Max Min Typ 2500 – 2700 2200 – 2565 135 – 300 ±12 155 8.4 ±0.6 +22 +8.0 13 0 9 26 25 40 12 14 10 +5 315 Max Comments See note 2 See note 3 6.5 10.5 5.4 9.9 Temp = 25 °C Referenced to +25 °C See note 4 See note 4 See note 5 +24 +17 -2.5 +2.5 -2.5 +2.5 PLO = 0 dBm PLO = 0 dBm 330 34 160 330 34 160 See note 6 See note 6 1. Specifications when using the application specific circuit (shown on page 3) with a low side LO = 0 dBm and IF = 240 MHz in a downconverting application at 25 °C. 2. IF matching components affect the center IF frequency. Proper component values for other IF center frequencies than shown can be provided by emailing to applications.engineering@wj.com. 3. The IF bandwidth of the converter is defined as 15% around any center frequency in its operating IF frequency range. The bandwidth is determined with external components. Specifications are valid around the total ±7.5% bandwidth. ie. with a center frequency of 240 MHz, the specifications are valid from 240 ± 18 MHz. 4. Assumes the supply voltage = +5 V. IIP3 is measured with Δf = 1 MHz with RFin = -5 dBm / tone. 5. Assumes LO injection noise is filtered at the thermal noise floor, -174 dBm/Hz, at the RF, IF, and Image frequencies. 6. The R1 resistor can be modified for the CV221-2A to draw less current. Changing it from 13 to 18Ω is expected to have the converter draw 17mA less current so that the converter will draw about 300mA typically under LO drive, while degrading the IIP3 performance by 0.5 dB. Absolute Maximum Rating Parameter Operating Case Temperature Storage Temperature DC Voltage Junction Temperature -40 to +85 °C -55 to +150 °C +5.5 V +220 °C Ordering Information Part No. CV221-2AF Rating Description 1.9-2.7GHz Dual-Branch Downconverter (lead-free/RoHS-compliant 6x6mm QFN package) CV221-2APCB240 Fully Assembled Eval. Board, IF = 240MHz Operation of this device above any of these parameters may cause permanent damage. Specifications and information are subject to change without notice WJ Communications, Inc • Phone 1-800-WJ1-4401 • FAX: 408-577-6621 • e-mail: sales@wj.com • W eb site: www.wj.com Page 1 of 5 June 2007 CV221-2A AMP1 INPUT IF1 OUTPUT 23 GND MIXER IF1 GND 28 RF 1 1 INPUT GND 2 BIAS 3 GND 4 N/C 5 GND 6 RF 2 7 INPUT 27 GND 26 25 24 GND 22 21 BIAS 1.9 – 2.7 GHz Dual-Branch Downconverter Device Architecture / Application Circuit Information IF IF Amp 1 Typical 2.1 GHz Downconverter Performance Chain Analysis (Each Branch) 20 GND 19 N/C 18 GND RF Stage LO Amp / MMIC Mixer IF Amplifier CV221-2A Gain (dB) Input P1dB (dBm) Input IP3 (dBm) NF (dB) Current (mA) 115 100 315* Gain (dB) LO Driver Amp IF Amp 2 RF 8 GND 9 MIXER IF2 17 LO 16 GND 15 N/C -8.4 20 33 9 17.6 1 21 2.2 Cumulative Performance Cumulative Performance Input Input NF P1dB IP3 (dB) (dBm) (dBm) -8.4 20 33 9 9.2 9 27.8 11 9.2 9 27.8 11 IF 10 GND 11 AMP2 INPUT 12 GND 13 IF2 OUTPUT 14 GND * The 2nd branch includes another mixer and IF amplifier, which increases the total current consumption of the MCM to be 315 mA. Printed Circuit Board Material: .014” FR-4, 4 layers, .062” total thickness CV221-2A: The application circuit can be broken up into three main functions as denoted in the colored dotted areas above: RF/IF diplexing (blue), IF amplifier matching (green), and dc biasing (purple). There are various placeholders for chip components in the circuit schematic so that a common PCB can be used for all WJ dual-branch converters. External Diplexer: This is only used with the cellular-band CV products. The mixer performs the diplexing internally for the CV221-2A; therefore the components shown in the diplexer section should be not be loaded except for L3, L10, L7, and L11, which should contain a 0 Ω jumper. IF Amplifier Matching: The IF amplifier requires matching elements to optimize the performance of the amplifier to the desired IF center frequency. Since IF bandwidths are typically on the order of 5 to 10%, a simple two element matching network, in the form of either a high-pass or low-pass filter structure, is sufficient to match the MMIC IF amplifier over these narrow bandwidths. Proper component values for other IF center frequencies can be provided by emailing to applications.engineering@wj.com. DC Biasing: DC bias must be provided for the LO and IF amplifiers in the converter. R1 sets the operating current for the last stage of the LO amplifier and is chosen to optimize the mixer LO drive level. Proper RF chokes and bypass capacitors are chosen for proper amplifier biasing at the intended frequency of operation. The “+5 V” dc bias should be supplied directly from a voltage regulator. WiMax Operation: There is no change to the application circuit for operation in the 2.5 to 2.7 GHz band. Specifications and information are subject to change without notice WJ Communications, Inc • Phone 1-800-WJ1-4401 • FAX: 408-577-6621 • e-mail: sales@wj.com • W eb site: www.wj.com Page 2 of 5 June 2007 CV221-2A 1.9 – 2.7 GHz Dual-Branch Downconverter Application Circuit: IF = 240 MHz (CV221-2APCB240) RF = 1900 – 2700 MHz, IF = 240 MHz PCB Layout Circuit Board Material: .014” FR-4, 4 layers, .062” total thickness Bill of Materials Ref. Desig. R1(1) R2, R3, R4, L3, L7 L10, L11 R6, R7 C1, C5, C10, C15 C4, C11 (2) C6, C12, C14 C7, C13 L1 L4, L8 (2) L5, L9 C2, C3, C8, C9, C16 C17, C19, C20, C21 C22, L2, L6 U1 Component 13 Ω chip resistor 0 Ω chip resistor 8.2 Ω chip resistor 1000 pF chip capacitor 3 pF chip capacitor .018 μF chip capacitor 100 pF chip capacitor 120 nH chip inductor 82 nH chip inductor 220 nH chip inductor Shown on silkscreen, but not used in actual circuit. CV221-2A WJ Converter QFN Size 0805 0603 0603 0603 0603 0603 0603 0603 0603 0805 Notes: 1. The R1 resistor can be modified for the CV221-2A to draw less current. Changing it from 13 to 18Ω is expected to have the converter draw 17mA less current so that the converter will draw about 300mA typically under LO drive, while degrading the IIP3 performance by 0.5 dB. 2. The values shown above have the IF tuned at 240 MHz and will affect the optimal performance of the converter. For other frequencies, these components need to be modified as follows: Ref. Desig. C4, C11 L4, L8 IF Amplifier Matching 50 70 75 100 120 140 155 180 240 18 pF 15 pF 15 pF 8.2 pF 8.2 pF 5.6 pF 5.6 pF 3.9pF 3.0 pF 390 nH 220 nH 220 nH 180 nH 150 nH 150 nH 120 nH 110 nH 82 nH Specifications and information are subject to change without notice WJ Communications, Inc • Phone 1-800-WJ1-4401 • FAX: 408-577-6621 • e-mail: sales@wj.com • W eb site: www.wj.com Page 3 of 5 June 2007 CV221-2A 1.9 – 2.7 GHz Dual-Branch Downconverter Typical Downconversion Performance Plots Performance using the circuitry on the CV221-2APCB240 Evaluation Board Conversion Loss vs RF Frequency vs Temperature LO = 0 dBm, IF = 240 MHz, low-side LO Input IP3 vs RF Frequency vs Temperature LO = 0 dBm, IF = 240 MHz, low-side LO Conversion Loss (dB) 10 Input IP3 (dBm) 32 30 28 26 24 -40 °C +25 °C +85 °C 9 8 7 6 -40 °C +25 °C +85 °C 5 1800 1900 2000 2100 2200 2300 22 1800 1900 2000 2100 2200 2300 RF Frequency (MHz) R-I Isolation vs RF Frequency L-R Isolation vs LO Frequency Referenced with LO = 0 dBm RF Frequency (MHz) L-I Isolation vs LO Frequency Referenced with LO = 0 dBm 30 L-R Isolation (dB) R-I Isolation (dB) 25 20 15 10 5 -40 °C +25 °C +85 °C L-I Isolation (dB) 35 30 25 20 15 -40 °C +25 °C +85 °C 25 20 15 10 -40 °C +25 °C +85 °C 5 1900 1950 2000 2050 2100 2150 2200 0 1500 1600 1700 1800 1900 2000 2100 10 1500 1600 1700 1800 1900 2000 2100 RF Frequency (MHz) RF Return Loss vs RF Frequency IF = 240 MHz, low-side LO at 0 dBm LO Frequency (MHz) LO Return Loss vs Frequency LO Frequency (MHz) IF Return Loss vs LO Frequency IF = 240 MHz, LO = 0 dBm 0 LO Return Loss (dB) RF Return Loss (dB) 0 -5 -10 -15 -20 -40 °C +25 °C +85 °C IF Return Loss (dB) 0 -5 -10 -15 -20 -40 °C +25 °C +85 °C -5 -10 -15 -20 -40 °C +25 °C +85 °C -25 1800 1900 2000 2100 2200 2300 -25 1500 1600 1700 1800 1900 2000 2100 -25 1500 1600 1700 1800 1900 2000 2100 RF Frequency (MHz) Input P1dB vs RF Frequency IF = 240 MHz, low-side LO at 0 dBm LO Frequency (MHz) Noise Figure vs RF Frequency IF = 240 MHz, low-side LO at 0 dBm LO Frequency (MHz) 14 Input P1dB (dBm) 14 Noise Figure (dB) 12 10 8 6 -40 °C +25 °C +85 °C 12 10 8 6 -40 °C +25 °C +85 °C 4 1800 1900 2000 2100 2200 2300 4 1900 1950 2000 2050 2100 2150 2200 RF Frequency (MHz) RF Frequency (MHz) Specifications and information are subject to change without notice WJ Communications, Inc • Phone 1-800-WJ1-4401 • FAX: 408-577-6621 • e-mail: sales@wj.com • W eb site: www.wj.com Page 4 of 5 June 2007 CV221-2A 1.9 – 2.7 GHz Dual-Branch Downconverter CV221-2AF Mechanical Information This package is lead-free/RoHS-compliant. The plating material on the pins is annealed matte tin over copper. It is compatible with both lead-free (maximum 260 °C reflow temperature) and leaded (maximum 245 °C reflow temperature) soldering processes. Outline Drawing Product Marking The component will be lasermarked with a “CV221-2AF” product label with an alphanumeric lot code on the top surface of the package. Tape and reel specifications for this part will be located on the website in the “Application Notes” section. ESD / MSL Information ESD Rating: Value: Test: Standard: ESD Rating: Value: Test: Standard: Class 1B Passes 500V to